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Adsorption of tetracycline on soil and sediment: Effects of pH and the presence of Cu(II) by Zheyun Zhang; Ke Sun; Bo Gao; Guixiang Zhang; Xitao Liu; Ye Zhao is a Environmental Science article available to read on EtoBox.

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Tetracycline (TC) is frequently detected in the environment, however, knowledge on the environmental fate and transport of TC is still limited. Batch adsorption experiments of TC by soil and sediment samples were conducted. The distribution of charge and electrostatic potential of individual atoms of various TC species in the aqueous solution were determined using MOPAC version 0.034 W program in ChemBio3D Ultra software. Most of the adsorption isotherms on the soil, river and marine sediments were well fitted with the Freundlich and Polanyi-Manes (PMM) models. The single point organic carbon (OC)-normalized adsorption distribution coefficients (K(OC)) and PMM saturated adsorption capacity (Q(OC)(0)) values of TC were associated with the mesopore volume and clay content to a greater extent, indicating the mesopore volume of the soil and sediments and their clay content possibly influenced the fate and transport of TC in the natural environment. The adsorption of TC on soil and sediments strongly depended on the pH and presence of Cu(II). The presence of Cu(II) facilitated TC adsorption on soil and sediments at low pH (pH<5), possibly due to the metallic complexation and surface-bri

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Author

Zheyun Zhang; Ke Sun; Bo Gao; Guixiang Zhang; Xitao Liu; Ye Zhao

Publisher

Elsevier BV

Published

2011

Language

EN

Field

Environmental Science (Physical Sciences)